Plots and returns the estimated gamma distribution of k (customers' regularity in interpurchase times).
pggg.mcmc.plotRegularityRateHeterogeneity(draws, xmax = NULL, fn = NULL)MCMC draws returned by pggg.mcmc.DrawParameters
upper bound for x-scale
optional function to summarize individual-level draws for k, e.g. 'mean'
Platzer, Michael, and Thomas Reutterer. 'Ticking Away the Moments: Timing Regularity Helps to Better Predict Customer Activity.' Marketing Science (2016).